./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label39.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label39.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d7a1ac2bddd27216563c8e31b878b94b733d43befd074e50a1bdc6b73a7213c --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:59:26,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:59:26,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:59:27,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:59:27,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:59:27,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:59:27,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:59:27,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:59:27,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:59:27,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:59:27,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:59:27,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:59:27,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:59:27,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:59:27,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:59:27,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:59:27,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:59:27,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:59:27,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:59:27,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:59:27,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:59:27,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:59:27,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:59:27,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:59:27,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:59:27,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:59:27,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:59:27,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:59:27,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:59:27,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:59:27,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:59:27,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:59:27,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:59:27,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:59:27,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:59:27,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:59:27,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:59:27,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:59:27,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:59:27,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:59:27,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:59:27,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:59:27,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:59:27,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:59:27,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:59:27,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:59:27,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:59:27,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:59:27,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:59:27,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:59:27,129 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:59:27,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:59:27,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:59:27,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:59:27,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:59:27,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:59:27,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:59:27,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:59:27,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:59:27,132 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:59:27,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:59:27,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:59:27,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:59:27,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:59:27,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:59:27,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:59:27,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:59:27,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:59:27,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:59:27,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:59:27,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:59:27,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:59:27,135 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:59:27,135 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:59:27,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:59:27,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:59:27,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d7a1ac2bddd27216563c8e31b878b94b733d43befd074e50a1bdc6b73a7213c [2021-12-15 09:59:27,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:59:27,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:59:27,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:59:27,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:59:27,429 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:59:27,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label39.c [2021-12-15 09:59:27,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ff22404/93067bc82b5545c6b1476d9bf0afd060/FLAG7ce104b26 [2021-12-15 09:59:28,127 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:59:28,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label39.c [2021-12-15 09:59:28,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ff22404/93067bc82b5545c6b1476d9bf0afd060/FLAG7ce104b26 [2021-12-15 09:59:28,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ff22404/93067bc82b5545c6b1476d9bf0afd060 [2021-12-15 09:59:28,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:59:28,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:59:28,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:59:28,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:59:28,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:59:28,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:59:28" (1/1) ... [2021-12-15 09:59:28,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf98965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:28, skipping insertion in model container [2021-12-15 09:59:28,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:59:28" (1/1) ... [2021-12-15 09:59:28,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:59:28,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:59:28,682 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label39.c[9366,9379] [2021-12-15 09:59:29,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:59:29,212 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:59:29,243 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label39.c[9366,9379] [2021-12-15 09:59:29,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:59:29,551 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:59:29,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29 WrapperNode [2021-12-15 09:59:29,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:59:29,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:59:29,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:59:29,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:59:29,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:29,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:29,846 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 09:59:29,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:59:29,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:59:29,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:59:29,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:59:29,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:29,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:29,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:29,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:30,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:30,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:30,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:30,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:59:30,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:59:30,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:59:30,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:59:30,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (1/1) ... [2021-12-15 09:59:30,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:59:30,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:59:30,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:59:30,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:59:30,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:59:30,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:59:30,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:59:30,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:59:30,302 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:59:30,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:59:33,144 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:59:33,157 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:59:33,157 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:59:33,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:59:33 BoogieIcfgContainer [2021-12-15 09:59:33,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:59:33,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:59:33,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:59:33,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:59:33,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:59:28" (1/3) ... [2021-12-15 09:59:33,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ac682c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:59:33, skipping insertion in model container [2021-12-15 09:59:33,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:29" (2/3) ... [2021-12-15 09:59:33,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ac682c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:59:33, skipping insertion in model container [2021-12-15 09:59:33,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:59:33" (3/3) ... [2021-12-15 09:59:33,168 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label39.c [2021-12-15 09:59:33,172 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:59:33,173 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:59:33,213 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:59:33,219 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:59:33,219 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:59:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 09:59:33,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:33,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:33,249 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash -696204111, now seen corresponding path program 1 times [2021-12-15 09:59:33,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:33,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310537865] [2021-12-15 09:59:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:33,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:33,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:33,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310537865] [2021-12-15 09:59:33,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310537865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:33,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:33,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:59:33,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082669304] [2021-12-15 09:59:33,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:33,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:33,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:33,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:33,553 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:36,268 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2021-12-15 09:59:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:36,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-15 09:59:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:36,286 INFO L225 Difference]: With dead ends: 1680 [2021-12-15 09:59:36,286 INFO L226 Difference]: Without dead ends: 1011 [2021-12-15 09:59:36,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:36,295 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 518 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:36,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:59:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-12-15 09:59:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2021-12-15 09:59:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2021-12-15 09:59:36,373 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 63 [2021-12-15 09:59:36,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:36,374 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2021-12-15 09:59:36,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2021-12-15 09:59:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 09:59:36,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:36,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:36,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:59:36,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:36,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1285088309, now seen corresponding path program 1 times [2021-12-15 09:59:36,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:36,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713220636] [2021-12-15 09:59:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:36,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:36,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:36,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713220636] [2021-12-15 09:59:36,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713220636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:36,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:36,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:59:36,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986605181] [2021-12-15 09:59:36,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:36,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:36,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:36,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:36,485 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:38,722 INFO L93 Difference]: Finished difference Result 2871 states and 5025 transitions. [2021-12-15 09:59:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:38,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-15 09:59:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:38,731 INFO L225 Difference]: With dead ends: 2871 [2021-12-15 09:59:38,731 INFO L226 Difference]: Without dead ends: 1877 [2021-12-15 09:59:38,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:38,735 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:38,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 520 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:59:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-12-15 09:59:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1870. [2021-12-15 09:59:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4719101123595506) internal successors, (2751), 1869 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2751 transitions. [2021-12-15 09:59:38,783 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2751 transitions. Word has length 128 [2021-12-15 09:59:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:38,786 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2751 transitions. [2021-12-15 09:59:38,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2751 transitions. [2021-12-15 09:59:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-15 09:59:38,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:38,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:38,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:59:38,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1757507228, now seen corresponding path program 1 times [2021-12-15 09:59:38,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:38,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359263616] [2021-12-15 09:59:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:38,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:38,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:38,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359263616] [2021-12-15 09:59:38,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359263616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:38,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:38,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:38,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778897205] [2021-12-15 09:59:38,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:38,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:38,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:38,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:38,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:38,953 INFO L87 Difference]: Start difference. First operand 1870 states and 2751 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:41,107 INFO L93 Difference]: Finished difference Result 5454 states and 8039 transitions. [2021-12-15 09:59:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-15 09:59:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:41,121 INFO L225 Difference]: With dead ends: 5454 [2021-12-15 09:59:41,122 INFO L226 Difference]: Without dead ends: 3586 [2021-12-15 09:59:41,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:41,127 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 431 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:41,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 914 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:59:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-12-15 09:59:41,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3583. [2021-12-15 09:59:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3355667225013959) internal successors, (4784), 3582 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4784 transitions. [2021-12-15 09:59:41,192 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4784 transitions. Word has length 133 [2021-12-15 09:59:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:41,193 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4784 transitions. [2021-12-15 09:59:41,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4784 transitions. [2021-12-15 09:59:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-15 09:59:41,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:41,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:41,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:59:41,197 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1312910319, now seen corresponding path program 1 times [2021-12-15 09:59:41,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:41,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626754879] [2021-12-15 09:59:41,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:41,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:41,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:41,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626754879] [2021-12-15 09:59:41,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626754879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:41,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:41,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:41,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041143513] [2021-12-15 09:59:41,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:41,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:59:41,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:59:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:59:41,423 INFO L87 Difference]: Start difference. First operand 3583 states and 4784 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:43,264 INFO L93 Difference]: Finished difference Result 7618 states and 10086 transitions. [2021-12-15 09:59:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:59:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-12-15 09:59:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:43,278 INFO L225 Difference]: With dead ends: 7618 [2021-12-15 09:59:43,278 INFO L226 Difference]: Without dead ends: 4037 [2021-12-15 09:59:43,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:59:43,293 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:43,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 09:59:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-12-15 09:59:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 4008. [2021-12-15 09:59:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 1.3014724232592962) internal successors, (5215), 4007 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 5215 transitions. [2021-12-15 09:59:43,365 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 5215 transitions. Word has length 174 [2021-12-15 09:59:43,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:43,366 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 5215 transitions. [2021-12-15 09:59:43,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 5215 transitions. [2021-12-15 09:59:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-15 09:59:43,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:43,370 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:43,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:59:43,371 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1487706324, now seen corresponding path program 1 times [2021-12-15 09:59:43,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:43,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531508171] [2021-12-15 09:59:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:43,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 09:59:43,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531508171] [2021-12-15 09:59:43,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531508171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:43,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:43,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:59:43,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997692087] [2021-12-15 09:59:43,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:43,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:43,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:43,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:43,508 INFO L87 Difference]: Start difference. First operand 4008 states and 5215 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:45,170 INFO L93 Difference]: Finished difference Result 10996 states and 14539 transitions. [2021-12-15 09:59:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-12-15 09:59:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:45,189 INFO L225 Difference]: With dead ends: 10996 [2021-12-15 09:59:45,190 INFO L226 Difference]: Without dead ends: 5711 [2021-12-15 09:59:45,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:45,197 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:45,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:59:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-12-15 09:59:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4434. [2021-12-15 09:59:45,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 4433 states have (on average 1.2091134671779833) internal successors, (5360), 4433 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 5360 transitions. [2021-12-15 09:59:45,272 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 5360 transitions. Word has length 202 [2021-12-15 09:59:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:45,272 INFO L470 AbstractCegarLoop]: Abstraction has 4434 states and 5360 transitions. [2021-12-15 09:59:45,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 5360 transitions. [2021-12-15 09:59:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-15 09:59:45,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:45,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:45,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:59:45,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1764789618, now seen corresponding path program 1 times [2021-12-15 09:59:45,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:45,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506193397] [2021-12-15 09:59:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:45,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:45,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506193397] [2021-12-15 09:59:45,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506193397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:45,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:45,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:45,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914542569] [2021-12-15 09:59:45,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:45,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:45,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:45,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:45,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:45,358 INFO L87 Difference]: Start difference. First operand 4434 states and 5360 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:46,871 INFO L93 Difference]: Finished difference Result 11414 states and 14015 transitions. [2021-12-15 09:59:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-12-15 09:59:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:46,893 INFO L225 Difference]: With dead ends: 11414 [2021-12-15 09:59:46,894 INFO L226 Difference]: Without dead ends: 6982 [2021-12-15 09:59:46,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:46,899 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:46,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:59:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2021-12-15 09:59:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6982. [2021-12-15 09:59:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 6981 states have (on average 1.1834980661796304) internal successors, (8262), 6981 states have internal predecessors, (8262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 8262 transitions. [2021-12-15 09:59:47,018 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 8262 transitions. Word has length 215 [2021-12-15 09:59:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:47,019 INFO L470 AbstractCegarLoop]: Abstraction has 6982 states and 8262 transitions. [2021-12-15 09:59:47,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 8262 transitions. [2021-12-15 09:59:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-12-15 09:59:47,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:47,024 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:47,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:59:47,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash 715443249, now seen corresponding path program 1 times [2021-12-15 09:59:47,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:47,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721968161] [2021-12-15 09:59:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:47,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-15 09:59:47,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:47,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721968161] [2021-12-15 09:59:47,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721968161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:47,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:47,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:47,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87495362] [2021-12-15 09:59:47,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:47,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:47,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:47,191 INFO L87 Difference]: Start difference. First operand 6982 states and 8262 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:48,952 INFO L93 Difference]: Finished difference Result 17788 states and 21273 transitions. [2021-12-15 09:59:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:48,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2021-12-15 09:59:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:48,980 INFO L225 Difference]: With dead ends: 17788 [2021-12-15 09:59:48,981 INFO L226 Difference]: Without dead ends: 9958 [2021-12-15 09:59:48,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:48,991 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 384 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:48,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 858 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:59:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9958 states. [2021-12-15 09:59:49,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9958 to 9958. [2021-12-15 09:59:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 1.1449231696294064) internal successors, (11400), 9957 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 11400 transitions. [2021-12-15 09:59:49,185 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 11400 transitions. Word has length 295 [2021-12-15 09:59:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:49,185 INFO L470 AbstractCegarLoop]: Abstraction has 9958 states and 11400 transitions. [2021-12-15 09:59:49,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 11400 transitions. [2021-12-15 09:59:49,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-12-15 09:59:49,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:49,193 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:49,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:59:49,193 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:49,195 INFO L85 PathProgramCache]: Analyzing trace with hash 403479436, now seen corresponding path program 1 times [2021-12-15 09:59:49,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:49,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187666065] [2021-12-15 09:59:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:49,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:49,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187666065] [2021-12-15 09:59:49,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187666065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:49,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:49,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:59:49,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110601120] [2021-12-15 09:59:49,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:49,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:59:49,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:59:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:59:49,359 INFO L87 Difference]: Start difference. First operand 9958 states and 11400 transitions. Second operand has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:52,134 INFO L93 Difference]: Finished difference Result 31022 states and 35502 transitions. [2021-12-15 09:59:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:59:52,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 335 [2021-12-15 09:59:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:52,166 INFO L225 Difference]: With dead ends: 31022 [2021-12-15 09:59:52,167 INFO L226 Difference]: Without dead ends: 21066 [2021-12-15 09:59:52,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:59:52,176 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 846 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:52,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 197 Invalid, 2947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:59:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21066 states. [2021-12-15 09:59:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21066 to 19354. [2021-12-15 09:59:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19354 states, 19353 states have (on average 1.146127215418798) internal successors, (22181), 19353 states have internal predecessors, (22181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19354 states to 19354 states and 22181 transitions. [2021-12-15 09:59:52,433 INFO L78 Accepts]: Start accepts. Automaton has 19354 states and 22181 transitions. Word has length 335 [2021-12-15 09:59:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:52,434 INFO L470 AbstractCegarLoop]: Abstraction has 19354 states and 22181 transitions. [2021-12-15 09:59:52,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 19354 states and 22181 transitions. [2021-12-15 09:59:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-15 09:59:52,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:52,443 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:52,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:59:52,446 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:52,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:52,446 INFO L85 PathProgramCache]: Analyzing trace with hash 995930622, now seen corresponding path program 1 times [2021-12-15 09:59:52,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:52,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59684523] [2021-12-15 09:59:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:52,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:59:52,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:52,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59684523] [2021-12-15 09:59:52,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59684523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:52,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:52,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:52,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141315736] [2021-12-15 09:59:52,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:52,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:52,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:52,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:52,563 INFO L87 Difference]: Start difference. First operand 19354 states and 22181 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:54,215 INFO L93 Difference]: Finished difference Result 43374 states and 49778 transitions. [2021-12-15 09:59:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 358 [2021-12-15 09:59:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:54,259 INFO L225 Difference]: With dead ends: 43374 [2021-12-15 09:59:54,259 INFO L226 Difference]: Without dead ends: 24021 [2021-12-15 09:59:54,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:54,279 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 363 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:54,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 427 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:59:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24021 states. [2021-12-15 09:59:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24021 to 19314. [2021-12-15 09:59:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19314 states, 19313 states have (on average 1.134158338942681) internal successors, (21904), 19313 states have internal predecessors, (21904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19314 states to 19314 states and 21904 transitions. [2021-12-15 09:59:54,529 INFO L78 Accepts]: Start accepts. Automaton has 19314 states and 21904 transitions. Word has length 358 [2021-12-15 09:59:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:54,530 INFO L470 AbstractCegarLoop]: Abstraction has 19314 states and 21904 transitions. [2021-12-15 09:59:54,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 19314 states and 21904 transitions. [2021-12-15 09:59:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-12-15 09:59:54,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:54,539 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:54,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:59:54,539 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash 56522163, now seen corresponding path program 1 times [2021-12-15 09:59:54,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:54,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001450469] [2021-12-15 09:59:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:54,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-15 09:59:54,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:54,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001450469] [2021-12-15 09:59:54,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001450469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:54,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:54,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:59:54,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401325031] [2021-12-15 09:59:54,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:54,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:54,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:54,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:54,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:54,678 INFO L87 Difference]: Start difference. First operand 19314 states and 21904 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:55,853 INFO L93 Difference]: Finished difference Result 38614 states and 43794 transitions. [2021-12-15 09:59:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-12-15 09:59:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:55,885 INFO L225 Difference]: With dead ends: 38614 [2021-12-15 09:59:55,885 INFO L226 Difference]: Without dead ends: 19302 [2021-12-15 09:59:55,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:55,906 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 669 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:55,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 122 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:59:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19302 states. [2021-12-15 09:59:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19302 to 19301. [2021-12-15 09:59:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19301 states, 19300 states have (on average 1.1335233160621763) internal successors, (21877), 19300 states have internal predecessors, (21877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19301 states to 19301 states and 21877 transitions. [2021-12-15 09:59:56,132 INFO L78 Accepts]: Start accepts. Automaton has 19301 states and 21877 transitions. Word has length 361 [2021-12-15 09:59:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:56,132 INFO L470 AbstractCegarLoop]: Abstraction has 19301 states and 21877 transitions. [2021-12-15 09:59:56,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 19301 states and 21877 transitions. [2021-12-15 09:59:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-12-15 09:59:56,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:56,142 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:56,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:59:56,143 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash -352479738, now seen corresponding path program 1 times [2021-12-15 09:59:56,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:56,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295508532] [2021-12-15 09:59:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:56,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-15 09:59:56,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:56,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295508532] [2021-12-15 09:59:56,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295508532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:56,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:56,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:56,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418789841] [2021-12-15 09:59:56,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:56,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:59:56,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:59:56,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:56,275 INFO L87 Difference]: Start difference. First operand 19301 states and 21877 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:59:58,048 INFO L93 Difference]: Finished difference Result 44996 states and 51051 transitions. [2021-12-15 09:59:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:59:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 378 [2021-12-15 09:59:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:59:58,076 INFO L225 Difference]: With dead ends: 44996 [2021-12-15 09:59:58,077 INFO L226 Difference]: Without dead ends: 25697 [2021-12-15 09:59:58,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:59:58,090 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 444 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:59:58,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 256 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:59:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25697 states. [2021-12-15 09:59:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25697 to 16726. [2021-12-15 09:59:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16726 states, 16725 states have (on average 1.1403288490284007) internal successors, (19072), 16725 states have internal predecessors, (19072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16726 states to 16726 states and 19072 transitions. [2021-12-15 09:59:58,331 INFO L78 Accepts]: Start accepts. Automaton has 16726 states and 19072 transitions. Word has length 378 [2021-12-15 09:59:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:58,332 INFO L470 AbstractCegarLoop]: Abstraction has 16726 states and 19072 transitions. [2021-12-15 09:59:58,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 16726 states and 19072 transitions. [2021-12-15 09:59:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-15 09:59:58,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:58,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:58,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:59:58,340 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2069008964, now seen corresponding path program 1 times [2021-12-15 09:59:58,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:58,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508061228] [2021-12-15 09:59:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:58,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:59:58,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:58,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508061228] [2021-12-15 09:59:58,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508061228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:59:58,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:59:58,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:59:58,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533877538] [2021-12-15 09:59:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:59:58,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:59:58,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:59:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:59:58,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:59:58,488 INFO L87 Difference]: Start difference. First operand 16726 states and 19072 transitions. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:00:00,812 INFO L93 Difference]: Finished difference Result 41566 states and 47275 transitions. [2021-12-15 10:00:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:00:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 402 [2021-12-15 10:00:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:00:00,839 INFO L225 Difference]: With dead ends: 41566 [2021-12-15 10:00:00,839 INFO L226 Difference]: Without dead ends: 24417 [2021-12-15 10:00:00,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:00:00,855 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 611 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:00:00,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 187 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 10:00:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24417 states. [2021-12-15 10:00:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24417 to 24416. [2021-12-15 10:00:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24416 states, 24415 states have (on average 1.137374564816711) internal successors, (27769), 24415 states have internal predecessors, (27769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24416 states to 24416 states and 27769 transitions. [2021-12-15 10:00:01,128 INFO L78 Accepts]: Start accepts. Automaton has 24416 states and 27769 transitions. Word has length 402 [2021-12-15 10:00:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:00:01,129 INFO L470 AbstractCegarLoop]: Abstraction has 24416 states and 27769 transitions. [2021-12-15 10:00:01,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 24416 states and 27769 transitions. [2021-12-15 10:00:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-12-15 10:00:01,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:00:01,139 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:00:01,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 10:00:01,139 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:00:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:00:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash 61958258, now seen corresponding path program 1 times [2021-12-15 10:00:01,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:00:01,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787846199] [2021-12-15 10:00:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:00:01,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:00:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:00:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-15 10:00:01,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:00:01,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787846199] [2021-12-15 10:00:01,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787846199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:00:01,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:00:01,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:00:01,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754252742] [2021-12-15 10:00:01,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:00:01,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:00:01,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:00:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:00:01,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:00:01,318 INFO L87 Difference]: Start difference. First operand 24416 states and 27769 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:03,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:00:03,082 INFO L93 Difference]: Finished difference Result 63733 states and 72347 transitions. [2021-12-15 10:00:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:00:03,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-12-15 10:00:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:00:03,123 INFO L225 Difference]: With dead ends: 63733 [2021-12-15 10:00:03,123 INFO L226 Difference]: Without dead ends: 39319 [2021-12-15 10:00:03,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:00:03,144 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 498 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:00:03,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 238 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 10:00:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39319 states. [2021-12-15 10:00:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39319 to 39303. [2021-12-15 10:00:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39303 states, 39302 states have (on average 1.1195613454786015) internal successors, (44001), 39302 states have internal predecessors, (44001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39303 states to 39303 states and 44001 transitions. [2021-12-15 10:00:03,653 INFO L78 Accepts]: Start accepts. Automaton has 39303 states and 44001 transitions. Word has length 424 [2021-12-15 10:00:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:00:03,654 INFO L470 AbstractCegarLoop]: Abstraction has 39303 states and 44001 transitions. [2021-12-15 10:00:03,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 39303 states and 44001 transitions. [2021-12-15 10:00:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-12-15 10:00:03,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:00:03,667 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:00:03,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 10:00:03,667 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:00:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:00:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1951505988, now seen corresponding path program 1 times [2021-12-15 10:00:03,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:00:03,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023198097] [2021-12-15 10:00:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:00:03,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:00:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:00:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 10:00:03,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:00:03,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023198097] [2021-12-15 10:00:03,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023198097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:00:03,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:00:03,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:00:03,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768357847] [2021-12-15 10:00:03,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:00:03,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:00:03,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:00:03,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:00:03,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:00:03,820 INFO L87 Difference]: Start difference. First operand 39303 states and 44001 transitions. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:00:06,560 INFO L93 Difference]: Finished difference Result 94795 states and 106067 transitions. [2021-12-15 10:00:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:00:06,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 471 [2021-12-15 10:00:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:00:06,624 INFO L225 Difference]: With dead ends: 94795 [2021-12-15 10:00:06,624 INFO L226 Difference]: Without dead ends: 52506 [2021-12-15 10:00:06,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:00:06,648 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 862 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2903 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 3207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:00:06,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 812 Invalid, 3207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2903 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 10:00:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52506 states. [2021-12-15 10:00:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52506 to 45666. [2021-12-15 10:00:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45666 states, 45665 states have (on average 1.109033176393299) internal successors, (50644), 45665 states have internal predecessors, (50644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45666 states to 45666 states and 50644 transitions. [2021-12-15 10:00:07,210 INFO L78 Accepts]: Start accepts. Automaton has 45666 states and 50644 transitions. Word has length 471 [2021-12-15 10:00:07,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:00:07,211 INFO L470 AbstractCegarLoop]: Abstraction has 45666 states and 50644 transitions. [2021-12-15 10:00:07,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 45666 states and 50644 transitions. [2021-12-15 10:00:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2021-12-15 10:00:07,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:00:07,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:00:07,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 10:00:07,226 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:00:07,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:00:07,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1067546786, now seen corresponding path program 1 times [2021-12-15 10:00:07,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:00:07,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666968179] [2021-12-15 10:00:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:00:07,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:00:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:00:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-15 10:00:07,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:00:07,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666968179] [2021-12-15 10:00:07,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666968179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:00:07,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:00:07,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:00:07,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101880372] [2021-12-15 10:00:07,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:00:07,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:00:07,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:00:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:00:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:00:07,399 INFO L87 Difference]: Start difference. First operand 45666 states and 50644 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:00:09,067 INFO L93 Difference]: Finished difference Result 94268 states and 104558 transitions. [2021-12-15 10:00:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:00:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 525 [2021-12-15 10:00:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:00:09,116 INFO L225 Difference]: With dead ends: 94268 [2021-12-15 10:00:09,116 INFO L226 Difference]: Without dead ends: 46898 [2021-12-15 10:00:09,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:00:09,143 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 413 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:00:09,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 671 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 10:00:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46898 states. [2021-12-15 10:00:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46898 to 46895. [2021-12-15 10:00:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46895 states, 46894 states have (on average 1.091461594233804) internal successors, (51183), 46894 states have internal predecessors, (51183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46895 states to 46895 states and 51183 transitions. [2021-12-15 10:00:09,851 INFO L78 Accepts]: Start accepts. Automaton has 46895 states and 51183 transitions. Word has length 525 [2021-12-15 10:00:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:00:09,852 INFO L470 AbstractCegarLoop]: Abstraction has 46895 states and 51183 transitions. [2021-12-15 10:00:09,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 46895 states and 51183 transitions. [2021-12-15 10:00:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-12-15 10:00:09,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:00:09,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:00:09,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 10:00:09,868 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:00:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:00:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash 742987499, now seen corresponding path program 1 times [2021-12-15 10:00:09,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:00:09,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433603209] [2021-12-15 10:00:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:00:09,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:00:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:00:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 61 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:00:10,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:00:10,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433603209] [2021-12-15 10:00:10,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433603209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:00:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985372235] [2021-12-15 10:00:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:00:10,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:00:10,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:00:10,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:00:10,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:00:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:00:10,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 10:00:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:00:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 61 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:00:11,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:00:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:00:12,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985372235] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 10:00:12,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 10:00:12,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2021-12-15 10:00:12,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048124501] [2021-12-15 10:00:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:00:12,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:00:12,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:00:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:00:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:00:12,993 INFO L87 Difference]: Start difference. First operand 46895 states and 51183 transitions. Second operand has 5 states, 5 states have (on average 109.6) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:15,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:00:15,864 INFO L93 Difference]: Finished difference Result 121912 states and 133380 transitions. [2021-12-15 10:00:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:00:15,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 109.6) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 548 [2021-12-15 10:00:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:00:15,946 INFO L225 Difference]: With dead ends: 121912 [2021-12-15 10:00:15,946 INFO L226 Difference]: Without dead ends: 72894 [2021-12-15 10:00:15,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 1090 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:00:15,978 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 885 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 3131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:00:15,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 116 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 10:00:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72894 states. [2021-12-15 10:00:16,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72894 to 56704. [2021-12-15 10:00:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56704 states, 56703 states have (on average 1.0897130663280603) internal successors, (61790), 56703 states have internal predecessors, (61790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56704 states to 56704 states and 61790 transitions. [2021-12-15 10:00:16,840 INFO L78 Accepts]: Start accepts. Automaton has 56704 states and 61790 transitions. Word has length 548 [2021-12-15 10:00:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:00:16,841 INFO L470 AbstractCegarLoop]: Abstraction has 56704 states and 61790 transitions. [2021-12-15 10:00:16,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.6) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 56704 states and 61790 transitions. [2021-12-15 10:00:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2021-12-15 10:00:16,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:00:16,881 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:00:16,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:00:17,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 10:00:17,096 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:00:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:00:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1859172721, now seen corresponding path program 1 times [2021-12-15 10:00:17,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:00:17,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142223981] [2021-12-15 10:00:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:00:17,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:00:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:00:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2021-12-15 10:00:17,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:00:17,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142223981] [2021-12-15 10:00:17,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142223981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:00:17,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:00:17,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:00:17,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469226597] [2021-12-15 10:00:17,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:00:17,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:00:17,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:00:17,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:00:17,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:00:17,554 INFO L87 Difference]: Start difference. First operand 56704 states and 61790 transitions. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:00:19,363 INFO L93 Difference]: Finished difference Result 118929 states and 129615 transitions. [2021-12-15 10:00:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:00:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 797 [2021-12-15 10:00:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:00:19,436 INFO L225 Difference]: With dead ends: 118929 [2021-12-15 10:00:19,436 INFO L226 Difference]: Without dead ends: 59676 [2021-12-15 10:00:19,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:00:19,469 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 443 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:00:19,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 717 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 10:00:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59676 states. [2021-12-15 10:00:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59676 to 57124. [2021-12-15 10:00:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57124 states, 57123 states have (on average 1.0799677888066104) internal successors, (61691), 57123 states have internal predecessors, (61691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57124 states to 57124 states and 61691 transitions. [2021-12-15 10:00:20,318 INFO L78 Accepts]: Start accepts. Automaton has 57124 states and 61691 transitions. Word has length 797 [2021-12-15 10:00:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:00:20,319 INFO L470 AbstractCegarLoop]: Abstraction has 57124 states and 61691 transitions. [2021-12-15 10:00:20,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:00:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 57124 states and 61691 transitions. [2021-12-15 10:00:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2021-12-15 10:00:20,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:00:20,357 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:00:20,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 10:00:20,357 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:00:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:00:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1682408212, now seen corresponding path program 1 times [2021-12-15 10:00:20,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:00:20,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289672239] [2021-12-15 10:00:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:00:20,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:00:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:00:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 1154 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-15 10:00:20,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:00:20,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289672239] [2021-12-15 10:00:20,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289672239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:00:20,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:00:20,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:00:20,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768399081] [2021-12-15 10:00:20,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:00:20,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:00:20,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:00:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:00:20,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:00:20,901 INFO L87 Difference]: Start difference. First operand 57124 states and 61691 transitions. Second operand has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)